辣海

From 在許 or 來許, where 在/來 underwent lenition and 許 underwent an irregular evolution. Completely unrelated to "spicy sea".

辣海 (Northern Wu)

1. to be (somewhere), to be in, to exist
2. Used to indicate the continuous aspect.

   儂辣海等啥人啊？ [Shanghainese, trad.]
   侬辣海等啥人啊？ [Shanghainese, simp.]

   Who are you waiting for?

   儂活辣海末浪費空氣，死脫末浪費土地，我乃搭儂見氣也是浪費辰光，豪𢜶滾開！ [Shanghainese, trad.]
   侬活辣海末浪费空气，死脱末浪费土地，我乃搭侬见气也是浪费辰光，豪𢜶滚开！ [Shanghainese, simp.]

   [nʊŋ²³ ɦɯə̯ʔ²² la̱ʔ⁵⁵ he̞³³ məʔ²¹ lɑ̃²² fi³³  kʊŋ⁵⁵ t͡ɕʰi²¹ ɕi³³ tʰəʔ⁵⁵ məʔ²¹ lɑ̃²² fi³³  tʰv̩ʷ³³ d̥i⁴⁴ ŋv̩ʷ²³ ne̞²³ ta̱ʔ³³ nʊŋ⁴⁴ t͡ɕi³³ t͡ɕʰi⁴⁴ ɦa̱²³ z̥z̩³³  lɑ̃²² fi³³  z̥əɲ²² kɯɑ̃⁴⁴ ɦɔ²² sɔ⁴⁴ kɯə̯ɲ⁴⁴  kʰe̞⁵³] [IPA]

   You're a waste of air alive and waste of soil dead, me talking to you right now is a waste of time, now fuck off!

3. (when placed at the end of a sentence) Used to indicate the perfective aspect.

   我早飯還嘸沒吃辣海。 [Shanghainese, trad.]
   我早饭还呒没吃辣海。 [Shanghainese, simp.]

   From: 2010: Qian Nairong, 《從〈滬語便商〉所見的老上海話時態》 (Tenses and Aspects? Old Shanghainese as Found in the Book Huyu Bian Shang)

   [ŋv̩ʷ²³ t͡sɔ³³ v̥e̞⁴⁴ ɦɯe̞²³ ɦm̩²² məʔ⁴⁴ t͡ɕʰi̯ɪʔ⁵⁵ la̱ʔ¹¹ he̞²³] [IPA]

   I have yet to eat my breakfast.

The spellings with 許／许 are used in varieties where 許／许 are pronounced /he/ or similar, such as Suzhounese and Ningbonese. Lects such as Shanghainese and Hangzhounese do not use them.